I really do know how you feel -- I've been going through the same thing over the last few months. Everyday I have a small bout of sadness, depression, etc. I never know why, it just comes and I get sooooo tired. I just can't get enough sleep. Then when I do go the doctor I feel sort of stupid. Like, will he believe me......blah blah blah. I'm just telling you this because I want you to know I truely know how you're feeling. People want to know "Why are you sad?" Well, he!! I don't know! If I did, may be I could fix it. It's just very frustrating.